1234422221 has 2 divisors, whose sum is σ = 1234422222. Its totient is φ = 1234422220.

The previous prime is 1234422193. The next prime is 1234422247. The reversal of 1234422221 is 1222244321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755425225 + 478996996 = 27485^2 + 21886^2 .

It is an emirp because it is prime and its reverse (1222244321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1234422221 - 2¹⁰ = 1234421197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234422251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617211110 + 617211111.

It is an arithmetic number, because the mean of its divisors is an integer number (617211111).

Almost surely, 2^1234422221 is an apocalyptic number.

It is an amenable number.

1234422221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234422221 is an equidigital number, since it uses as much as digits as its factorization.

1234422221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 23.

The square root of 1234422221 is about 35134.3453190749. The cubic root of 1234422221 is about 1072.7237854193.

Adding to 1234422221 its reverse (1222244321), we get a palindrome (2456666542).

The spelling of 1234422221 in words is "one billion, two hundred thirty-four million, four hundred twenty-two thousand, two hundred twenty-one".